Constraints on ultraviolet absorption in the intracluster medium of Abell 1030

Show simple item record Koekemoer, Anton en_US O'Dea, Christopher en_US Baum, Stefi en_US Sarazin, Craig en_US Owen, Frazer en_US Ledlow, Michael en_US 2006-05-17T18:26:10Z en_US 2006-05-17T18:26:10Z en_US 1998-12-01 en_US
dc.identifier.citation Astrophys.J. 508 (1998) 608-620 en_US
dc.identifier.issn 1538-4365 en_US
dc.identifier.uri en_US
dc.description.abstract We present results from an extensive HST spectroscopic search for UV absorption lines in the spectrum of the quasar B2 1028+313, which is associated with the central dominant galaxy in the cluster Abell 1030 (z=0.178). This is one of the brightest known UV continuum sources located in a cluster, and therefore provides an ideal opportunity to obtain stringent constraints on the column densities of any cool absorbing gas that may be associated with the intracluster medium (ICM). Our HST spectra were obtained with the FOS and GHRS, and provide continuous coverage at rest-frame wavelengths from ~975 to 4060°A, thereby allowing the investigation of many different elements and ionization levels. We utilize a new technique that involves simultaneous fitting of large numbers of different transitions for each species, thereby yielding more robust constraints on column densities than can be obtained from a single transition. This method yields upper limits of ~<10^11−10^13 cm^−2 on the column densities of a wide range of molecular, atomic and ionized species that may be associated with the ICM. We also discuss a possible Ly-alpha and C IV absorption system associated with the quasar. We discuss the implications of the upper limits on cool intracluster gas in the context of the physical properties of the ICM and its relationship to the quasar (Refer to PDF file for exact formulas). en_US
dc.description.sponsorship We would like to thank Tony Keyes and Chris Blades for valuable discussions during the course of this work. We are also very grateful to D. P. Schneider for kindly making available the absorption-line identification software package that is used for the HST Quasar Absorption Line Key Project and for providing vital help regarding the use of this software. We would also like to thank the anonymous referee for useful suggestions that helped to improve the paper. Support for this work was provided by NASA through grant number GO-05934.01-94A from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. M. Ledlow thanks Elizabeth Rizza for her help in obtaining the APO spectra. The Apache Point Observatory is maintained and operated by the Astrophysical Research Consortium (ARC). en_US
dc.format.extent 1096221 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher Astrophysical Journal en_US
dc.relation.ispartofseries vol. 508 en_US
dc.relation.ispartofseries no. 2 en_US
dc.subject Galaxies - clusters - individual - A1030 en_US
dc.subject Intergalactic medium en_US
dc.subject Quasars - absorption lines en_US
dc.subject Quasars - individual - B2 1028+313 en_US
dc.subject Ultraviolet - galaxies en_US
dc.title Constraints on ultraviolet absorption in the intracluster medium of Abell 1030 en_US
dc.type Article en_US

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